USDA Hardiness Zone 7a
Frost Dates for 89447 — Yerington, Nevada
NOAA 1991–2020 normals from Yerington, NV (4,380 ft), 4 miles northwest.
Updated
In Yerington, the last spring frost (32°F) is around April 29 in half of years and has passed by May 16 in nine years out of ten. The first fall frost comes around October 15, as early as September 30 one year in ten, leaving a typical freeze-free season of 167 days (NOAA, Yerington, NV).
- Last spring frost
- April 29
- First fall frost
- October 15
- Growing season
- 167 days
- Hardiness zone
- 7a
50% probability
50% probability
freeze-free, 50%
0 to 5°F (-17.8 to -15.0°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 15%
- Snow per year
- 0.7"
median, 1991–2020
median, 1991–2020
4 of 27 observed
NOAA normal
Frost risk by date in Yerington
Half of springs at Yerington, NV see their last 32°F night by April 29; only one in ten is past it by April 13, and one in ten still has one after May 16. Planting tender crops after May 6 leaves a 30% risk of a frost on them, after May 11 20%, and after May 16 10%. The 17 days between the even-odds date and the one-in-ten date is narrower than at 82% of the 38 Nevada stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 15 in half of years, as early as September 30 one year in ten, and holds off past October 27 one year in ten. A hard freeze of 28°F follows 11 days later, around October 26; in spring the one-in-ten date for 28°F is May 2, 14 days before the 32°F one. The freeze-free season lasts 167 days in a typical year, longer than at 53% of the 38 Nevada stations; it reaches 188 days one year in ten and falls short of 145 one year in ten. On average 136 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 15 days longer, to about May 14, and return around October 4. Severe cold of 16°F or below comes every winter, usually between November 25 and February 15.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 28 | May 2 | May 6 | May 11 | May 14 | May 20 | May 24 | May 30 | Jun 4 |
| 32°F | Apr 13 | Apr 19 | Apr 22 | Apr 26 | Apr 29 | May 2 | May 6 | May 11 | May 16 |
| 28°F | Mar 25 | Apr 2 | Apr 6 | Apr 10 | Apr 13 | Apr 18 | Apr 21 | Apr 25 | May 2 |
| 24°F | Mar 3 | Mar 10 | Mar 15 | Mar 20 | Mar 26 | Mar 30 | Apr 3 | Apr 7 | Apr 16 |
| 20°F | Feb 9 | Feb 19 | Feb 24 | Feb 28 | Mar 4 | Mar 8 | Mar 12 | Mar 18 | Mar 25 |
| 16°F | Jan 12 | Jan 28 | Feb 3 | Feb 10 | Feb 15 | Feb 20 | Feb 26 | Mar 1 | Mar 9 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 21 | Sep 26 | Sep 30 | Oct 2 | Oct 4 | Oct 7 | Oct 9 | Oct 13 | Oct 18 |
| 32°F | Sep 30 | Oct 4 | Oct 7 | Oct 12 | Oct 15 | Oct 17 | Oct 20 | Oct 24 | Oct 27 |
| 28°F | Oct 11 | Oct 16 | Oct 20 | Oct 23 | Oct 26 | Oct 28 | Oct 31 | Nov 2 | Nov 6 |
| 24°F | Oct 21 | Oct 26 | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 9 | Nov 12 | Nov 17 |
| 20°F | Oct 28 | Nov 2 | Nov 6 | Nov 10 | Nov 13 | Nov 17 | Nov 20 | Nov 23 | Nov 27 |
| 16°F | Nov 9 | Nov 14 | Nov 19 | Nov 22 | Nov 25 | Nov 28 | Dec 1 | Dec 4 | Dec 11 |
Freeze probabilities 1991–2020 at Yerington, NV, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 89447 →Compare Yerington with another place →
Weather by month in Yerington
July is the warmest month at Yerington, NV, averaging 93°F by day and 59°F at night; December is the coldest at 44°F and 22°F. A freezing night is all but certain in every month from October to April (a 90% chance or more). From June to August the chance of a 32°F night stays under 10% each month. In spring, May still brings one in 44% of years.
Warmth for growing adds up to 3,240 growing degree days a year (base 50°F), more than at 50% of the 38 Nevada stations. 31% of them (1,011) have built up by the end of June, and July adds the most, 806. Precipitation totals 4.4 inches a year, most in May (0.6") and least in September (0.1"); May to September bring 36% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 46 | 23 | 0.5 | 100% | 28 | 1 |
| Feb | 51 | 26 | 0.4 | 100% | 23 | 2 |
| Mar | 59 | 32 | 0.5 | 100% | 18 | 37 |
| Apr | 65 | 37 | 0.3 | 99% | 9 | 106 |
| May | 75 | 45 | 0.6 | 44% | 1 | 311 |
| Jun | 85 | 52 | 0.4 | 0% | 0 | 556 |
| Jul | 93 | 59 | 0.3 | 0% | 0 | 806 |
| Aug | 92 | 57 | 0.2 | 0% | 0 | 750 |
| Sep | 84 | 49 | 0.1 | 11% | <1 | 488 |
| Oct | 70 | 38 | 0.3 | 95% | 6 | 167 |
| Nov | 55 | 28 | 0.4 | 100% | 22 | 16 |
| Dec | 44 | 22 | 0.4 | 100% | 28 | 2 |
Monthly normals 1991–2020 at Yerington, NV (4,380 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Topaz Lake, NV, 26 miles southwest of Yerington and 912 feet higher, has a last frost 13 days later (May 12), a first frost 9 days earlier (October 6), a season 22 days shorter.
When it snows in Yerington, Nevada
Measurable snow is rare here: only 4 of 27 winters from 1991 to 2020 recorded 0.1 inch or more at Smith 6 N, NV, 13.4 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 89447
| When | What to do |
|---|---|
| February 18 – March 4 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| March 4 – March 18 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| April 1 – April 15 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 29 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 23 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 1 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 15 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 89447 is 4 miles from Yerington, NV, which stands at 4,380 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 89447 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.